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Patent US4015286A successfully refreshed from Google Patents.
US3208221A
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Hydraulic operating apparatus
Assignee: DROTT Manufacturing CORP
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Filing: 1963-09-30
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Granted: 1965-09-28
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Expires: 1983-09-30
Abstract
No abstract record available.
Inventors
- 👤 John R Schuetz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:17
CPC Classifications
F; F15; F15B; F15B11/00; F15B11/16; F15B11/17; B; B62; B62D; B62D11/00; B62D11/02; B62D11/06; B62D11/10; B62D11/14; B62D11/18; B62D11/183; F15B2211/00; F15B2211/20; F15B2211/205; F15B2211/20576; F15B2211/30; F15B2211/305; F15B2211/3056; F15B2211/30565; F15B2211/3059; F15B2211/30595; F15B2211/31; F15B2211/3105; F15B2211/3116; F15B2211/50; F15B2211/505; F15B2211/50509; F15B2211/50518; F15B2211/55; F15B2211/70; F15B2211/71; F15B2211/7142
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
HYDRAULIC OPERATING APPARATUS FOR A WHEELED VEHICLE HAVING A MATERIAL HANDLING MEANS THEREON COMPRISING HYDRAULIC DRIVING MEANS FOR DRIVING THE VEHICLE, HYDRAULIC OPERATING MEANS FOR THE MATERIAL HANDLING MEANS, TWO HYDRAULIC PUMPS ON THE VEHICLE, AND CONTROL VALVES CONNECTING THE PUMPS TO THE DRIVING MEANS AND TO THE OPERATING MEANS, THE CONTROL VALVES BEING POSITIONABLE TO EFFECT A FIRST OPERATING CONDITION IN WHICH BOTH PUMPS ARE CONNECTED TO THE DRIVING MEANS TO SUPPLY ACTUATING FLUID THERETO, A SECOND OPERATING CONDITION IN WHICH ONE PUMP IS CONNECTED TO THE DRIVING MEANS AND THE OTHER TO THE OPERATING MEANS, AND A THIRD OPERATING CONDITION IN WHICH BOTH PUMPS ARE CONNECTED TO THE OPERATING MEANS.
Claim 2
Dependent Claim
112 words
HYDRAULIC OPERATING APPARATUS FOR A WHEELED VEHICLE HAVING A MATERIAL HANDLING MEANS THEREON COMPRISING HYDRAULIC DRIVING MEANS FOR DRIVING THE VEHICLE, HYDRAULIC OPERATING MEANS FOR THE MATERIAL HANDLING MEANS, TWO HYDRAULIC PUMPS ON THE VEHICLE, AND CONTROL VALVES CONNECTING THE PUMPS TO THE DRIVING MEANS AND TO THE OPERATING MEANS, THE CONTROL VALVES BEING POSITIONABLE TO EFFECT A FIRST OPERATING CONDITION IN WHICH BOTH PUMPS ARE CONNECTED TO THE DRIVING MEANS TO SUPPLY ACTUATING FLUID THERETO, A SECOND OPERATING CONDITION IN WHICH ONE PUMP IS CONNECTED TO THE DRIVING MEANS AND THE OTHER TO THE OPERATING MEANS, AND A THIRD OPERATING CONDITION IN WHICH BOTH PUMPS ARE CONNECTED TO THE OPERATING MEANS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |